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Home >> Jeep >> 1970 >> Wagoneer 5.7L Eng, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Tune-Up - V8 >> Compression Pressure

Compression Pressure

With air cleaner removed and throttle and choke wide open, crank engine through at least four compression strokes. Compression pressure is satisfactory if lowest reading cylinder is more than 75% of highest reading cylinder.